2x + x + 3x = 3.6(2 + 1 + 3)x = 3.66x = 3.6x = 3.6÷6x = 0.6
6x=3.6x=0.6
合并同类项6x=3.6,所以x=0.6
2X+X+3X=3.66X=3.6X=0.6
2x+x+3x=3.6 解: 6x=3.6 x=3.6/6 x=.6
2x+x+3x=3.6 6x=3.6 x=0.6